package com.smart.aspect;

import java.util.Map;
import java.lang.reflect.Method;
import com.smart.entity.SysUser;
import lombok.extern.slf4j.Slf4j;
import com.alibaba.fastjson.JSON;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import com.smart.util.IpAddressUtil;
import com.smart.util.SysUserUtils;
import com.smart.utils.ServletUtils;
import com.smart.manager.AsyncManager;
import com.smart.entity.SysOperationLog;
import org.aspectj.lang.annotation.Aspect;
import com.smart.common.annotation.SysLog;
import com.smart.common.enums.StatusEnums;
import org.springframework.http.HttpMethod;
import org.apache.commons.lang.StringUtils;
import org.aspectj.lang.annotation.Pointcut;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.aspectj.lang.reflect.MethodSignature;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.AfterReturning;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.multipart.MultipartFile;

/**
 * @author lgb
 * @date 2020年6月22日 下午3:14:09
 * Copyright (C) 深圳工勘科技
 * @说明: 系统日志，切面处理类
 **/
@Slf4j
@Aspect
@Component
public class WebLogAspect {

    /** 配置织入点 */
    @Pointcut("@annotation(com.smart.common.annotation.SysLog)")
    public void logPointCut() {}

    /**
     * 处理完请求后执行
     * @param joinPoint 切点
     **/
    @AfterReturning(pointcut="logPointCut()",returning="jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     * @param joinPoint 切点
     * @param e         异常
     **/
    @AfterThrowing(value="logPointCut()",throwing="e")
    public void doAfterThrowing(JoinPoint joinPoint,Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint,final Exception e,
    		Object jsonResult){
        try {
            // 获得注解
            SysLog controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }
            // 获取当前的用户
            SysUser loginUser = SysUserUtils.getSysUser();
            // *========数据库日志=========*//
            SysOperationLog operLog = new SysOperationLog();
            operLog.setStatus(StatusEnums.ENABLE.getKey());
            // 请求的地址
            String ip = IpAddressUtil.getIpAddr(ServletUtils.getRequest());
            operLog.setOperIp(ip);
            // 返回参数
            operLog.setJsonResult(JSON.toJSONString(jsonResult));
            operLog.setOperUrl(ServletUtils.getRequest().getRequestURI());
            if (loginUser != null) {
                operLog.setOperName(loginUser.getUsername());
            }
            if (e != null) {
                operLog.setStatus(StatusEnums.DISABLE.getKey());
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(ServletUtils.getRequest().getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog);
            // 保存数据库
            AsyncManager.me().execute(AsyncFactory.recordOper(operLog));
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     * @param log     日志
     * @param operLog 操作日志
     * @throws Exception
     **/
    public void getControllerMethodDescription(JoinPoint joinPoint, SysLog log, SysOperationLog operLog) throws Exception {
        // 设置action动作
        operLog.setBusinessType(log.businessType().ordinal());
        // 设置标题
        operLog.setTitle(log.title());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
    }

    /**
     * 获取请求的参数，放到log中
     * @param operLog 操作日志
     * @throws Exception 异常
     **/
    private void setRequestValue(JoinPoint joinPoint, SysOperationLog operLog) throws Exception {
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setOperParam(StringUtils.substring(params, 0, 2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) ServletUtils.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            operLog.setOperParam(StringUtils.substring(paramsMap.toString(), 0, 2000));
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     **/
    private SysLog getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();

        if (method != null) {
            return method.getAnnotation(SysLog.class);
        }
        return null;
    }

    /**
     * 参数拼装
     **/
    private String argsArrayToString(Object[] paramsArray) {
        StringBuilder params = new StringBuilder();
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (!isFilterObject(paramsArray[i])) {
                    Object jsonObj = JSON.toJSON(paramsArray[i]);
                    params.append(jsonObj.toString()).append(" ");
                }
            }
        }
        return params.toString().trim();
    }

    /**
     * 判断是否需要过滤的对象。
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     **/
    public boolean isFilterObject(final Object o) {
        return  o instanceof MultipartFile||o instanceof HttpServletRequest||o instanceof HttpServletResponse;
    }
    
}